package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrdersMapper ordersMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    private Orders orders;

    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        AddressBook addressBook = addressBookMapper.selectById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        QueryWrapper<ShoppingCart> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("user_id", userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.selectList(queryWrapper);

        if(shoppingCartList.isEmpty()){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        this.orders = orders;
        ordersMapper.insert(orders);

        for(ShoppingCart cart : shoppingCartList){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailMapper.insert(orderDetail);
        }

        QueryWrapper<ShoppingCart> queryWrapper1 = new QueryWrapper<>();
        queryWrapper1.eq("user_id", userId);
        shoppingCartMapper.delete(queryWrapper1);

        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.selectById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        Integer OrderPaidStatus = Orders.PAID;//支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单
        LocalDateTime check_out_time = LocalDateTime.now();//更新支付时间
        ordersMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, this.orders.getId());

        Map map = new HashMap();
        // 1表示来单提醒 2表示客户催单
        map.put("type", 1);
        map.put("orderId", this.orders.getId());
        map.put("content", "订单号: " + this.orders.getNumber());
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        QueryWrapper<Orders> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("number", outTradeNo);
        Orders ordersDB = ordersMapper.selectOne(queryWrapper);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        ordersMapper.updateById(orders);


    }

    @Override
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {
        QueryWrapper<Orders> queryWrapper = new QueryWrapper<>();
        if(status != null) {
//            page = 1;
            queryWrapper.eq("status", status);
        }
        Page<Orders> ordersPage = ordersMapper.selectPage(new Page<>(page, pageSize), queryWrapper);
        List<Orders> ordersList = ordersPage.getRecords();
        List<OrderVO> orderVOList = new ArrayList<>();
        for(Orders orders : ordersList){
            OrderVO orderVO = new OrderVO();
            Long orderId = orders.getId();// 订单id
            List<OrderDetail> orderDetails = orderDetailMapper.selectList(new QueryWrapper<OrderDetail>().eq("order_id", orderId));
            BeanUtils.copyProperties(orders, orderVO);
            orderVO.setOrderDetailList(orderDetails);
            orderVOList.add(orderVO);
        }
        PageResult pageResult = new PageResult();
        pageResult.setTotal(ordersMapper.selectCount(queryWrapper));
        pageResult.setRecords(orderVOList);
        return pageResult;
    }

    @Override
    public OrderVO details(Long id) {
        // 根据id查询订单
        Orders orders = ordersMapper.selectById(id);

        // 查询该订单对应的菜品/套餐明细
        QueryWrapper<OrderDetail> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("order_id", id);
        List<OrderDetail> orderDetailList = orderDetailMapper.selectList(queryWrapper);

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    @Override
    public void userCancelById(Long id) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        ordersMapper.updateById(orders);
    }

    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        QueryWrapper<OrderDetail> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("order_id", id);
        List<OrderDetail> orderDetailList = orderDetailMapper.selectList(queryWrapper);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        for(ShoppingCart shoppingCart : shoppingCartList){
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        Integer page = ordersPageQueryDTO.getPage();
        Integer pageSize = ordersPageQueryDTO.getPageSize();
        String number = ordersPageQueryDTO.getNumber();
        String phone = ordersPageQueryDTO.getPhone();
        Integer status = ordersPageQueryDTO.getStatus();
        LocalDateTime beginTime = ordersPageQueryDTO.getBeginTime();
        LocalDateTime endTime = ordersPageQueryDTO.getEndTime();
        QueryWrapper<Orders> queryWrapper = new QueryWrapper<>();
        if(number != null) {
            queryWrapper.eq("number", number);
        }
        if(phone != null) {
            queryWrapper.eq("phone", phone);
        }
        if(status != null) {
            queryWrapper.eq("status", status);
        }
        if(beginTime != null) {
            queryWrapper.ge("begin_time", beginTime);
        }
        if(endTime != null) {
            queryWrapper.le("end_time", endTime);
        }

        Page<Orders> ordersPage = new Page<>(page, pageSize);
        ordersPage.setRecords(ordersMapper.selectList(queryWrapper));

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(ordersPage);
//        System.out.println("*****");
//        System.out.println(orderVOList);
//        System.out.println("*****");

        return new PageResult(ordersMapper.selectCount(queryWrapper), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getRecords();
        if (!ordersList.isEmpty()) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        QueryWrapper<OrderDetail> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("order_id", orders.getId());
        List<OrderDetail> orderDetailList = orderDetailMapper.selectList(queryWrapper);

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        QueryWrapper<Orders> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("status", Orders.TO_BE_CONFIRMED);
        Integer toBeConfirmed = Math.toIntExact(ordersMapper.selectCount(queryWrapper));
        queryWrapper.clear();
        queryWrapper.eq("status", Orders.CONFIRMED);
        Integer confirmed = Math.toIntExact(ordersMapper.selectCount(queryWrapper));
        queryWrapper.clear();
        queryWrapper.eq("status", Orders.DELIVERY_IN_PROGRESS);
        Integer deliveryInProgress = Math.toIntExact(ordersMapper.selectCount(queryWrapper));
        queryWrapper.clear();

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        ordersMapper.updateById(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款");
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        ordersMapper.updateById(orders);
    }

    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款");
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        ordersMapper.updateById(orders);
    }

    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        ordersMapper.updateById(orders);
    }

    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        ordersMapper.updateById(orders);
    }

    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map = new HashMap();
        // 1表示来单提醒 2表示客户催单
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号: " + ordersDB.getNumber());
        String json = JSON.toJSONString(map);

        webSocketServer.sendToAllClient(json);
    }
}
